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INA213: Damage due to fast voltage change replacement part

Ben Strawbridge
Prodigy 120 points
Part Number: INA213
Other Parts Discussed in Thread: INA282, INA210, INA193, INA271-HT, INA200, INA270, INA240, INA203, LM5056A, INA206

Hello,

 

Looking for a bit of help with a re-design where the original engineer is no longer here. We currently use an INA213A and it has suffered from the latch up issue described in the datasheet, even though we are at approximately 1KV/µs. Historically we tried the recommended ferrite and cap approach and this did not work so we have ended up with an RC filter to stop these fast transients.

 

Now we are re-designing this PCB we are considering the INA213B as a replacement to allow us to remove the RC filter (which is desirable as we manually select capacitors to remain in tolerance). Can you confirm that this has completely fixed the issue and what the transient robustness is of the INA213B (what is the maximum dV/dt we can apply)?

 

I have also seen the INA282 which may be suitable but seems to have a much larger gain error, but I think this may be because it is stated over a larger voltage variation, however I am unsure. If this is the case are there comparable numbers?

 

Finally are there any others that I could consider?

  • 0
    TI__Mastermind 28415 points
    Hello Ben,

    We are looking at this now and will clarify these differences soon.

    Peter Iliya
    Current Sense Applications
  • 0
    TI__Mastermind 28415 points

    Ben,

    The difference between Version A and Versions B and C are the internal ESD protection diodes and their structure. The internal component of the Version A device that will latch up during a high-voltage transient is not present in the B and C versions, thus these devices cannot latch up and no spec of robustness (dV/dt) is necessary. This difference is also talked about here.

    You can read more about suppressing high-voltage transient signals here: http://www.ti.com/tool/TIDA-00302

    The gain error specs for the INA210 and INA282 are actually very comparable since their testing conditions include the same power supply, Vcm, Vref, and range of Vsense (-5mV to +5mV). The INA282 does have a much high input Vcm range, but it is not straightforward on why INA282 has a slightly high gain error spec compared to the INA210. If you go to all of the current sensing products at Ti.com and assort the products with Vcm, you will see the following devices can accept 80V Vcm:

    INA271-HT, INA193, INA240, INA200, INA203, INA206, INA270, LM5056A, INA282. Among these are some automotive qualified versions. In order to make a specific recommendation I would need more information.

    Please contact if you have more questions.

     

    Best,

    Peter Iliya

    Current Sense Applications